Blast-pipe for furnace-grates



(No Model.) B- J GORDON. 2 Sheets-Sheet 1.

BLAST PIPE FOR FURNACE GRATES.

No. 491,549. Patented Feb. 14, 1893.

15207250] Gordolz/ BLAST PIPE FOR FURNACE GRATES.

No. 491,549. Patented Feb. 14, 1893.

ELONSO J. GORDON, OF GREENVILLE, MICHIGAN.

BLAST-PEPE FOR FURNACE-GRATES.

SPECIFICATION forming part of Letters Patent No. 491,549, dated February14, 1893.

Application filed September 26, 1892. Serial No. 4%,908. (No model.)

To aZZ whom it may concern.-

Be it known that I, ELONSO J. GORDON, a citizen of the United States,residing at Greenville, in the county of Montcalm and State of Michigan,have invented a new and useful Blast-Pipe for Furnace-Grates, of whichthe following is a specification.

This invention relates to blast pipes for furnace grates; and it has forits object to provide an improved construction of blast pipe adapted tobe connected with the blast grate bars of a furnace grate, whichconstruction not only provides means for the ready setting up of theblast pipe to accommodate various widths of grates, but also providesmeans whereby any particular part of the blast pipe can be repairedwithout disturbing the other parts.

WVith these and many other objects in view which Will readily appear asthe nature of the invention is better understood, the same consists inthe novel construction, combination and arrangement of parts hereinaftermore fully described, illustrated and claimed.

In the accompanying drawingsz-Figure 1 is a vertical sectional view of afurnace grate having a blast pipe connected therewith and constructed inaccordance with this invention. Fig. 2 is a similar view illustratingthe blast pipe as adapted to a different width of grate than thatillustrated in Fig. 1. Fig. 3 isa detail elevation showing a detachedgroup of T and plain sections of pipe. Fig. at is an enlarged detailelevation partly in section of a section of the blast pipe, illustratingthe different connections therewith.

Referring to the accompanying drawings:- A represents a furnace gratecomprising the alternately arranged series of hollow blast grate bars B,and the intermediate closed or draft grates O separating and spacingsaid blast grate bars. It will be apparent that in placing a grate ofthis construction into furnaces already built, that the width of thegrates must necessarily differ according to the size of the furnace, andalso that any nu mber of hollow blast grate bars may be employedaccording to the fuel used, or to the draft, or blast requirements ofthe particular furnace. lVith this in mind it will be apparent that itwill be necessary to have blast conducting devices which accompany theThe blast pipe D illustrated in Figs. 1 and 1 2 comprises a series ofalternate flanged T-sections of pipe E, and intermediate plain sectionsF, connecting and spacing the alternate T-sections. Both the T and plainsections of pipe, composing the main sectional blast pipe D, havecircular end flanges G which abut and are suitably clamped together bymeans of bolts, preferably, in order that the entire device can beeasily set up originally, or anyone of the sections thereof removed orreplaced by a new section if it should be necessary. Connecting pipes11. connect the alternate T-sections of the blast pipe to the hollowgrate bar lying directly thereover, as is clearly illustrated.

In constructing the hollow grate bars which are always of a uniformwidth, the T-sections, E, of the sectional blast pipe are at the sametime constructed in a length equal to the width of such hollow gratebars, and are therefore themselves always of a uniform length, and aredesigned to accompany the hollow grate bars of a width equal to suchlengths of pipe. Now, as before set forth, it is apparent that somegrates have more hollow grate bars than other grates, and therefore theintermediate draft or other grates 0, must necessarily vary in theirwidths, while the said hollow grate bars are always of the same width.Therefore, as the T-sections of the blast pipe are arranged directlyunder the hollow grate bars to which they are connected so as to allowthe pipes H to be readily connected therewith and to the grate bars, itwill be seen that the intermediate plain sections of piping must alsovary in length to correspond with the width of the varying intermediategrate bars, and thereby accommodate the sectional blast pipe to thevarying widths of grates.

From the foregoing description, the many advantages attendant uponconstructing a sectional blast pipe which has the componentparts thereofcorrespond in length to the width of the component parts of the grate,so that the same form parts of a single apparatus which can be readilyset up in any furnace, will be apparent to those skilled in the art.

In Fig. tor the drawings is illustrated the preferred and modified formsof the connection of the vertical pipes H with the T-sections E and alsowith the hollow grate bars B. As illustrated in this figure of thedrawings the T-sections E, are each provided with the coupling collarse, having the interior raised angular annular coupling beads e, whichare designed to bite the lower ends of the vertical connecting pipes H,which are inserted within said coupling collars, while the upper endsthereof are received by the collars b of the grate bars B, which may ormay not be provided with similarbeads. Now, as illustrated in dottedlines, it will be seen that while this. raised bead or coupling annulusholds the vertical pipe in tight connection therewith,

it at the same time allows the said pipe to vary somewhat from theperpendicular without injury thereto, or the impairment of the jointwhich should be practically air-tight. This is rendered necessary by theunavoidable contraction and expansion of the grate surface above. Theother forms illustrated in this figure show the coupling collars with anexterior bead and without a bead, respectively, such forms being used iffound necessary, but the first form described is preferably employedinasmuch as the outside diameter of boiler tubing, of which the pipesHare diameter of the same and are therefore more readily fitted into aninterior coupling as described. Further,from a practical stand point,inasmuch as the alternating draft grates are of all widths, and as aconsequence, the plain sections of pipe F vary with almost every grateonaccount of the different sizes of furnaces, it follows that it isessential, and of much advantage, that the T-sections of the blast pipeare uniformly the same so as to require only the plain sections to bevaried according to the width of grate, whereas on the other hand itwould be necessary to provide patterns for all sections of the pipeaccording to the size of every single grate, and therefore destroy oneof the greatest advantages of the present grate, that is, its shipmentas a single apparatus ready to be set up in any furnace whose size hasbeen previously given to the grate manufacturer.

By reference to Figs. 1 and 2 of the drawings, it will be observed thatthe blast pipe D further comprises a main blast section M and a smallerdiameter blast reducing section B, forming a continuation thereof tosecure the proper distribution and intensity of the blast. Asillustrated the end T-section of the main blast section is provided withthe described end flanges G, of the same diameter, while the plainsection of the reducing portion or section of the blast pipe connectedto such T- section, and lettered R, is further provided at one end withan enlarged circular end flange R which is of the same diameter as theend flanges of the larger T-sections, to one of which flanges saidenlarged flange is bolted. Some .plain sections of pipe are thereforemanufactured in proper sizes to provide for the reducing of the blast,and are constructed with enlarged end flanges to provide for the properconnections.

Having thus described my invention, what I claim and desire to secure byLetters Patent is:

1. In combination with a grate composed of hollow blast grate bars andother grate bars I; placed alternately, a sectional blast pipecomprising alternate T-sections and plain sections removablyconnectedtogether,said T-sections being arranged directly under the hollow blastgrate bars and made of uniform lengths equal to the width of the hollowblast grate bars di- 1 rectly thereover, and connections from eachT-section to a hollow blast grate bar, substantially as set forth.

made, is much more uniform than the inside 2. In combination with thehollow grate bars of a blast grate having depending receiving collars;the main blast pipe having collars or T-sections provided with interiorannular coupling beads, and the vertical connecting pipes received bysaid collars, substantially as set forth.

3. In combination with the hollow grate bars of a blast grate; the mainblast pipe comprising alternate T and plain sections having circular endflanges and aligned in sections of two diameters to reduce the blast,the end plain section of pipe of the smaller or reducing section beingfurther provided with an enlarged end flange of the same diameter as theend flange of the larger T-section coupled thereto, substantially as setforth.

In testimony that I claim the foregoing as my own I have hereto affixedmy signature in the presence of two witnesses.

ELONSO J. GORDON.

Witnesses:

A. G. PHELPS, W. M, CoNovER.

